Plastic plasticized with alkyl alkoxy hydroxy stearates



Patented Jan. 6, 1953 PLASTIC PLASTICIZED WITH ALKYL ALKOXY HYDROXY STEARATES Daniel Swen-n, Philadelphia, Pa., assignor to the United States of America as represented by the Secretary of Agriculture No Drawing. Application June 27, 1950, Serial No. 170,674

(Granted under Title 35, U. S. Code (1952),

sec. 266) 6 Claims.

HO OH 1 cmooon HC-O 27 and wherein R is an alkyl group containing from 1 to 4 carbon atoms. The 9,l(l0,9) indicates that the stearate or octadecanol may be either the 9,10 or the 10,9 form, or a mixture of them.

Production of suitable octadecanols is disclosed in my Patent No. 2,491,533 and of suitable stearates in my copending application Serial No. 2,796, filed January 16, 1948.

In general, according to this invention, the plastics, cellulose esters, such as cellulose acetate, and vinyl chloride-vinyl acetate copolymers, have been found to be compatible with the particular plasticizers mentioned, and the plasticizer particularly an alkoxyhydroxystearate is used to plasticize these or mixtures of them to produce compositions displaying physical properties which render them valuable in the production of films, coating compositions, etc. The amount of plasticizer used is not sharply critical, but for most purposes, when cellulose acetate is the plastic, from about 5 to 10% by weight of the plasticizer, on basis of the plastic, and, when vinyl chloride-vinyl acetate copolymer is the plastic, from about 5 to is preferred, depending to some extent on the particular plasticizer used.

The following examples, tabulated in Table 1, exhibit particular plastics utilizing the plasticizers mentioned. In each Example I through XIII, the plasticizer was used in conjunction with a cellulose acetate stock solution consisting of cellulose acetate, 25-345 g., nitropropane, ml., n-butanol, 37.5 ml., ethanol 76.5 ml., and toluene, ml. The plasticizer was dissolved in suitable amount (about 20 ml.) in the stock solution, and the resulting solution was spread on a glass plate (6" x 8") by means of a doctor blade. The thickness of the wet film so obtained was approximately 0.043" with the object of obtaining a dry film about 0003-0004" thick. The solvent was allowed to evaporate slowly, and the residual film after being removed from the plate was allowed to dry in the air for several days to ensure complete removal of the solvent.

In Examples XIV through XVIII, the plasticizer was used in conjunction with a vinyl chloride-vinyl acetate copolymer, the stock solution used being 20 g. of the copolymer (ratio of vinyl chloride to vinyl acetate being 87 to 13) per g. of dioxone, the films being similarly made.

Table 1 Amount of plasticizer Example Plasticizer percent Results weight of dry film Methyl 9,l0(l0,9) methoxyhydroxystearate. 8. 3 Compatible. .do 10.0 Slightly cloudy.

Ethyl 9,l0(10,9) ethoxyhydroxystearate 8. 0 D0. n-Butyl 9,l0(10,9) n-butoxyhydroxystearate. 5. 6 Do.

9,l0(l0,9) methoxyhydroxyoctadecanol 5.6 Compatible. do 10.0 Slightly cloudy.

9,l0(l0,9) ethoxyhydroxyoctadecanol. 5.1-7.6 Compatible. 9,10(10,9) n-propoxyhydroxyoctadecano 5.6 Do. do 10. 2 Slightly c1oudy.

9,l0(l0,9) n-butoxyhydroxyoctadecanol- 5. 5 Compatible. clo 10.0 Slightly cloudy.

9,l0(l0,9) i-butoxyhydroxyoctadecan 5. 8 Compatible. do 11.1 Slightly cloudy.

Methyl 9,l0(10,9) methoxyhydroxystearate... 5-35. 6 Compatible. Ethyl 9,l0(l0,9) ethoxyhydroxystearate 5. 4 Do. do 11.1 Shghtlygreasy.

n-Butyl 9,l0(l0,9) n-butoxyhydroxystearate. 5.1 Compatible. i-Butyl 9,l0(10,9) i-butoxyhydroxystearate 5.3 Do.

CH CH) FHC OH OH COOR a( 2 7LH& OR:|( 2)1 wherein R is an alkyl group containing from 1 to 4 carbon atoms.

2. Cellulose acetate plasticized with a plasticizer corresponding to the formula wherein R is an alkyl group containing from 1 to 4 carbon atoms.

3. Cellulose acetate plasticized with methyl 9,10(10,9) methoxyhydroxystearate.

4. A vinyl chloride-vinyl acetate copolymer plasticized with a plasticizer corresponding to the formula 4 wherein R is an alkyl group containing from 1 to 4 carbon atoms.

5. A vinyl chloride-vinyl acetate copolymer plasticized with methyl 9,10(10,9) methoxyhydroxystearate.

6. A cellulose ester plasticized with a compound corresponding to the formula on on DECADE-l ornooon a( 21 LH(]J OR 27 wherein R is an alkyl group containing from 1 to 4 carbon atoms.

DANIEL SWERN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,332,849 Gruber et al Oct. 26, 1943 2,357,833 Kropscott et al Sept. 12, 1944 2,491,533 Swern Dec. 20, 1949 

1. A PLASTIC SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS A VINYL CHLORIDE-VINYL ACETATE COPOLYMER, AND MIXTURES THEREOF, PLASTICIZED WITH A PLASTICIZER CORRESPONDING TO THE FORMULA 